Spark Plug (socket) Sizes?
Years ago on American cars weren't all spark plugs using the smaller
When did 13/16 sockets for plugs become commonplace?
What's the other common socket size for spark plugs? What about metric? Import cars?
thanks,
No.
Oh, 40 years ago or so I'll guess...
Nope.
Well, my 1949, 1966, 1969, 1973, and 1993 American vehicles all use
13/16 plugs. In fact, I've never owned a vehicle that used 5/8 plugs. I know that the Chrysler 440 "motorhome" cylinder head required them due to an extra cooling passage near the base of the plug hole, but that's the only application I can think of right off the top of my head.
A long time ago, even before my time, there were spark plugs with a 7/8 hex and 18 mm thread. Now we have 18 mm, 5/8, 13/16 along with 10 mm, 12 mm and
14 mm threads.| |Is it fair to say that 5/8 and 13/16 were both popularly and widely |used on older American cars? Just as likely to have one or the other |or roughly 50/50? | |My newer Japanese cars all seem to use 13/16. However my newer German |car uses 5/8. | |What is the broadly generalized version of who uses (used) what |when...?
From memory, with all the limitations that brings ...;)
GM came with 5/8" plugs in 1971. Most GM cars use them still Ford can't make up their mind, but 5/8 plugs seem to be the majority today Chrysler - ditto
|I also have a 3/4" spark plug socket that I've never used.
Small engines, as in lawnmower
|I think there is also an 18mm spark plug socket around but donno about |that one either...
Motorcycles
Rex in Fort Worth
Thanks everyone! That really helpded clarify the evolution of all these spark plug sockets I have here!
thanks again
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